I just recently migrated to odoo 14.
here I am facing an issue with menus.
I have added a menu with menu items but it does not show.
here is my simple code for xml.
<menuitem id="root_menu" name="Documents"/>
<menuitem
id="menu_attachment_document"
name="Documents"
parent="root_menu"
sequence="1"/>
<menuitem
id="menu_attachment_child"
name="Documents"
parent="menu_attachment_document"
action="base.action_attachment"
sequence="2"/>